Releases

First version for Omeka Classic, the counterpart of MCP Server 1.1 for Omeka S.

• The endpoint /mcp (Streamable HTTP, stateless): the 2026-07-28 protocol and the 2025 initialize handshake from one address. Every request runs as an Omeka user, so Omeka's permissions, record ownership and plugins' hooks apply.
• Signing in: an OAuth 2.1 server for the Claude and ChatGPT apps, Claude Code and Codex, with discovery documents, Client ID Metadata Documents and dynamic registration, PKCE, refresh token rotation, and a consent page in the admin where the user chooses read-only or edit access. Or an Omeka API key as a bearer token, or in the address for servers that drop the Authorization header.
• MCP Connections in the admin: how to connect each assistant with the site's address filled in, a check that the Authorization header reaches Omeka, and the apps users connected, to disconnect them.
• 26 tools (29 with deleting on): omeka_info; search_elements and get_item_type for Classic's element sets and item types; search_resources (keywords, field conditions, collection, item type, tags, dates) and get_resource (with the image); create_items, create_collection, update_resources (set, add, remove or clear values, visibility, featured, collection, item type, tags, alt text, dry run), add_files and request_upload; get_site, update_site, update_navigation, list_themes, get_theme_settings, update_theme_settings (checked against the theme's own form, dry run) and request_theme_upload; simple pages (get_page, create_page, update_page); exhibits and their pages built from blocks (get_exhibit, create_exhibit, update_exhibit, create_exhibit_page, update_exhibit_page), with describe_block_layouts reading each layout's options from its form, Block Suite's included; and, when allowed, delete_resources, delete_page and delete_exhibit_page.
• Metadata is keyed by "Element Set:Element" ("Dublin Core:Title"), with dcterms terms for Dublin Core and bare names when unambiguous; unknown fields get suggestions, and Item Type Metadata fields are checked against the item type. Every problem is reported at once.
• Settings: OAuth, anonymous read access, read-only mode, deleting, the visibility of new records (including "always private"), an intake collection, notes for assistants, allowed browser origins and disabled tools.
• Other plugins can add tools with the mcp_tools filter.